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src/HOL/Imperative_HOL/Heap.thy
changeset 37678 0040bafffdef
parent 36640 7eadf5acdaf4
child 37714 2eb2b048057b 
--- a/src/HOL/Imperative_HOL/Heap.thy	Thu Jul 01 16:54:42 2010 +0200
+++ b/src/HOL/Imperative_HOL/Heap.thy	Thu Jul 01 16:54:44 2010 +0200
@@ -18,9 +18,9 @@
 
 instance nat :: heap ..
 
-instance "*" :: (heap, heap) heap ..
+instance prod :: (heap, heap) heap ..
 
-instance "+" :: (heap, heap) heap ..
+instance sum :: (heap, heap) heap ..
 
 instance list :: (heap) heap ..
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